The class for controll of a keyboard

KeyboardsController.java

import android.app.Activity;
import android.content.Context;
import android.support.annotation.NonNull;
import android.view.View;
import android.view.inputmethod.InputMethodManager;
import android.widget.EditText;

import java.util.Objects;


@android.support.annotation.VisibleForTesting()
public class KeyboardsController {

    private static final long UI_UPDATE_DELAY = 1000l;
    private static InputMethodManager mInputManager = null;

    public static void hideKeyboard(@NonNull final Context cxt) {
        // check if no view has focus:
        View v = ((Activity) cxt).getCurrentFocus();
        if (v == null)
            return;
        mInputManager = (InputMethodManager) cxt
                .getSystemService(Context.INPUT_METHOD_SERVICE);
        if (mInputManager != null) {
            mInputManager.showSoftInput(v, InputMethodManager.HIDE_NOT_ALWAYS);
            Objects.requireNonNull(mInputManager).hideSoftInputFromWindow(v.getWindowToken(), 0);
        }
    }

    public static void showSoftInput(@NonNull final Context cxt, final EditText editText) {
        mInputManager = (InputMethodManager) cxt
                .getSystemService(Context.INPUT_METHOD_SERVICE);
        editText.postDelayed(() -> {
            if (mInputManager != null) {
                mInputManager.showSoftInput(editText, InputMethodManager.SHOW_IMPLICIT);
            }
        }, UI_UPDATE_DELAY);
        editText.requestFocus();
    }

    @android.support.annotation.VisibleForTesting()
    public static InputMethodManager getInputManager(){
        return mInputManager;
    }
}